Yes, you can vacuum seal chopped onions for freezer storage. This helps prevent freezer burn and preserves their flavor and texture for longer.
Vacuum sealing is an excellent method for preserving chopped onions in the freezer. Here's a step-by-step guide:
Chop the Onions: Begin by chopping the onions to your desired size. Ensure they are relatively uniform for even freezing.
Portion the Onions: Divide the chopped onions into usable portions. Consider how you typically use onions in your cooking (e.g., 1/2 cup, 1 cup). This makes it easier to grab the right amount when you need it.
Bag the Onions: Place each portion into a vacuum seal bag. Ensure the bag is compatible with your vacuum sealer.
Vacuum Seal: Use your vacuum sealer to remove the air from the bag and create a tight seal. This prevents freezer burn and helps maintain the onion's quality.
Freeze: Lay the sealed bags flat in the freezer. This helps them freeze quickly and evenly, and also saves space.
Vacuum-sealed onions can typically last for 8-12 months in the freezer.
Flash freeze the chopped onions on a baking sheet before vacuum sealing. Spread the chopped onions in a single layer on a baking sheet lined with parchment paper and freeze for about an hour. This prevents them from clumping together in the bag, making it easier to use individual portions later.